Re using YouTube
Sometimes, I have to disconnect, wait, reconnect . . . VPN service, and that resolves the issue.
Sometimes, I have to restart the computing device, then peck around YouTube, and finally it plays.
Sometimes, I use Vivaldi browser ← that works; and sometimes, after using Vivaldi, then BB works.
I suspect that Google is looking for enough “fingerprint” material, computing device “identifiers” . . . and then, “it works.”
Applying that to a Google account - that might help(?), but I do not have a Google account, and I have not been able to dig further - monitoring the sequence of network activity.
TIP: Use and compare the Developer Tools > Network windows of all of BB, Firefox, and Microsoft Edge.